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Preparation method of flexible wearable strain sensor

A strain sensor, flexible technology, applied in the direction of electric/magnetic solid deformation measurement, textile and paper making, fiber processing, etc., to achieve the effect of enhancing bonding force, increasing specific surface area, and low production cost

Inactive Publication Date: 2019-02-15
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most current strain sensors only achieve high sensitivity or a large strain range
Therefore, it is still a great challenge to fabricate flexible strain sensors with large sensing range and high GF.

Method used

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  • Preparation method of flexible wearable strain sensor
  • Preparation method of flexible wearable strain sensor
  • Preparation method of flexible wearable strain sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare 30 mL of MWCNT solution with a concentration in the range of 0.001 g / mL, then add sodium dodecylsulfonate (the mass ratio of dispersant to MWCNT is 1:3), and disperse evenly in an ultrasonic machine. Stretch the fiber to a certain length (0-100%) and put it into the MWCNT dispersion for 3 minutes, then repeat the process 5 times.

[0027] Then the fibers dipped in the MWCNT conductive layer were immersed in 100 mL of pyrrole solution with a concentration of 0.1 mol / L for 20 minutes in an ice bath. 100 mL FeCl 3 ·6H 2 Mixed solution of O and sodium anthraquinone-2-sulfonate (FeCl 3 ·6H 2 O as an oxidant, sodium anthraquinone-2-sulfonate as a dopant) was dropped within 30 minutes, polymerized for 2 hours, and dried in an oven.

[0028] Finally, the fibers are assembled into strain sensors with copper foil and conductive glue.

Embodiment 2

[0030] Prepare 30 mL of MWCNT solution with a concentration in the range of 0.005 g / mL, then add sodium dodecylsulfonate (the mass ratio of dispersant to MWCNT is 1:3), and disperse evenly in an ultrasonic machine. Stretch the fiber to a certain length (0-100%) and put it into the MWCNT dispersion for 3 minutes, then repeat the process 5 times.

[0031] Then the fibers dipped in the MWCNT conductive layer were immersed in 100 mL of pyrrole solution with a concentration of 0.1 mol / L for 20 minutes in an ice bath. 100 mL FeCl 3 ·6H 2 Mixed solution of O and sodium anthraquinone-2-sulfonate (FeCl 3 ·6H 2 O as an oxidant, sodium anthraquinone-2-sulfonate as a dopant) was dropped within 30 minutes, polymerized for 2 hours, and dried in an oven.

[0032] Finally, the fibers are assembled into strain sensors with copper foil and conductive glue.

Embodiment 3

[0034] Prepare 30 mL of MWCNT solution with a concentration in the range of 0.003 g / mL, then add sodium dodecylsulfonate (the mass ratio of dispersant to MWCNT is 1:3), and disperse evenly in an ultrasonic machine. Stretch the fiber to a certain length (0-100%) and put it into the MWCNT dispersion for 3 minutes, then repeat the process 5 times.

[0035] Then the fibers dipped in the MWCNT conductive layer were immersed in 100 mL of pyrrole solution with a concentration of 0.1 mol / L for 20 minutes in an ice bath. 100 mL FeCl 3 ·6H 2 Mixed solution of O and sodium anthraquinone-2-sulfonate (FeCl 3 ·6H 2 O as an oxidant, sodium anthraquinone-2-sulfonate as a dopant) was dropped within 30 minutes, polymerized for 2 hours, and dried in an oven.

[0036] Finally, the fibers are assembled into strain sensors with copper foil and conductive glue.

[0037] In the technique of the present invention, the effects of stretching dip coating and polymerization are as follows:

[0038] ...

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Abstract

The invention relates to a preparation method of a flexible wearable strain sensor. The preparation method is low in production cost, simple in process, and green and the environmentally-friendly; thespecific surface areas of fibers are increased in manners of stretching, dip-coating and polymerization, so that more conductive matters are loaded on the fibers, and the conductivity of the fibers and the resistance stability after stretching are enhanced; secondly, a dispersing agent added in a carbon nano-tube dispersing solution can be taken as a doping agent in the pyrrole polymerization process, and conjugated double bonds of the doping agent can increase the solubility of a carrier and improve the conductivity of pyrrole. Moreover, carbon nano-tubes act as nano-particles, and the specific surface area when polypyrrole is in contact with the carbon nano-tubes is increased, so that the bonding force between the polypyrrole and the carbon nano-tubes is enhanced, a composite conductivenetwork cannot be destroyed in the stretching process and maintains a stable state. Therefore, not only is the large strain range of the flexible strain sensor met, but also the high sensitivity is maintained, and a foundation is laid for human-machine interface interaction, personal health monitoring and treatment.

Description

technical field [0001] The invention specifically relates to the technical field of new material preparation, in particular to a preparation method of a flexible wearable strain sensor. Background technique [0002] As electronic devices tend to be more integrated, intelligent and portable, flexible, wearable and stretchable electronic devices have become a research hotspot. In particular, flexible strain sensors for detecting human motion, respiration and pulse, and monitoring personal health and therapy have great commercial prospects in the fields of health monitoring, medical diagnosis, soft robotics, etc. Stretchability, sensitivity, and conductivity are the three key factors that determine the sensor performance among all the parameters of flexible strain sensors. At present, a lot of attempts have been made to improve the performance of flexible sensors, such as using flexible conductive fibers and substrates, combining graphene, metal nanoparticles, carbon nanotubes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37D06M11/74D06M13/256G01B7/16
CPCD06M11/74D06M13/256D06M15/37G01B7/16
Inventor 赵健伟庄再裕刘连梅
Owner JIAXING UNIV
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